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This study evaluated the accuracy and interrater reliability of US Army physician assistants (PAs) in identifying ankle fracture patterns using existing classification schemes.Twenty-eight PAs reviewed criteria for stability, Danis-Weber, and Lauge-Hansen ankle fracture classification systems. Participants reviewed 45 ankle radiographs and independently rated each radiograph using these classification schemes.Participants were able to successfully identify ankle fracture stability in 82.1% of cases (95% CI, 77.6, 86.6) with established criteria. Using the Danis-Weber classification, accurate classification was achieved in 77.8% of cases (95% CI, 72.8, 82.7). The Lauge-Hansen classification system was least reliable, with accuracy of 54.5% (95% CI, 46, 63).Referring PAs can reliably discern unstable ankle fractures in more than 80% of cases. Lauge-Hansen classification was significantly less accurate than the Danis-Weber system or criteria for stability. Good communication between orthopedic surgeons and PAs and an emphasis on PA orthopedic education can improve patient care.